Disable merge button

[aaron-ai]

revert #5175

[codecov-commenter]

Codecov Report

Merging #5190 (a4440b2) into develop (a3e5965) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #5190      +/-   ##
=============================================
- Coverage      43.24%   43.24%   -0.01%     
+ Complexity      7805     7803       -2     
=============================================
  Files            997      997              
  Lines          69362    69362              
  Branches        9161     9161              
=============================================
- Hits           29999    29998       -1     
- Misses         35597    35601       +4     
+ Partials        3766     3763       -3     

Impacted Files	Coverage Δ
...ent/impl/consumer/DefaultLitePullConsumerImpl.java	68.75% <0.00%> (-0.63%)	⬇️
...a/org/apache/rocketmq/store/StoreStatsService.java	38.67% <0.00%> (-0.56%)	⬇️
...che/rocketmq/acl/plain/PlainPermissionManager.java	78.22% <0.00%> (-0.54%)	⬇️
...rocketmq/broker/processor/PopMessageProcessor.java	37.63% <0.00%> (-0.54%)	⬇️
...va/org/apache/rocketmq/store/FlushDiskWatcher.java	81.25% <0.00%> (ø)
...mq/store/ha/autoswitch/AutoSwitchHAConnection.java	71.77% <0.00%> (+0.26%)	⬆️
...he/rocketmq/client/impl/consumer/ProcessQueue.java	62.38% <0.00%> (+0.91%)	⬆️
...va/org/apache/rocketmq/store/util/PerfCounter.java	66.49% <0.00%> (+2.09%)	⬆️
...org/apache/rocketmq/store/ha/WaitNotifyObject.java	85.71% <0.00%> (+5.35%)	⬆️

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[lizhanhui]

Why merge is enabled again? Isn't keeping commits linear satisfying?